WO2012028521A1 - Système de freinage pour véhicules automobiles - Google Patents

Système de freinage pour véhicules automobiles Download PDF

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Publication number
WO2012028521A1
WO2012028521A1 PCT/EP2011/064595 EP2011064595W WO2012028521A1 WO 2012028521 A1 WO2012028521 A1 WO 2012028521A1 EP 2011064595 W EP2011064595 W EP 2011064595W WO 2012028521 A1 WO2012028521 A1 WO 2012028521A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake
pressure
brake system
cylinder
supply device
Prior art date
Application number
PCT/EP2011/064595
Other languages
German (de)
English (en)
Inventor
Steffen Linkenbach
Stefan A. Drumm
Original Assignee
Continental Teves Ag & Co. Ohg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Teves Ag & Co. Ohg filed Critical Continental Teves Ag & Co. Ohg
Priority to CN201180042046.4A priority Critical patent/CN103079914B/zh
Priority to KR1020137007847A priority patent/KR101926883B1/ko
Priority to EP11748938.5A priority patent/EP2611658B1/fr
Priority to US13/818,143 priority patent/US9096206B2/en
Publication of WO2012028521A1 publication Critical patent/WO2012028521A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • B60T11/20—Tandem, side-by-side, or other multiple master cylinder units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B60T7/06—Disposition of pedal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
    • B60T8/4081—Systems with stroke simulating devices for driver input
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/44—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems
    • B60T8/441—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems using hydraulic boosters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/40—Failsafe aspects of brake control systems
    • B60T2270/402—Back-up
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/82—Brake-by-Wire, EHB

Definitions

  • the invention relates to a brake system for motor vehicles with an actuatable by means of a brake pedal main ⁇ brake cylinder, are connected to the wheel brakes, an electrically controllable pressure supply device, a pressure control valve assembly for controlling and / or control of a wheel brake Radbremsdru ⁇ ckes and a first electronic control and control unit, which controls or regulates the pressure-providing device and / or the pressure regulating valve arrangement.
  • Such braking systems often include a pedal decoupling unit which ei ⁇ nem master cylinder is connected upstream, creating a brake pedal brake-by-wire by the driver in ""a separation of the direct hydraulic connection of the master cylinder with the wheel brakes, so ⁇ causes a connection of the output of the pressure supply hydraulic pressure to the wheel brakes.
  • ⁇ causes a connection of the output of the pressure supply hydraulic pressure to the wheel brakes.
  • the electrically controllable pressure- preparing device acts on the wheel brakes with brake pressure, in order to provide the driver in the "brake-by-wire" operating mode with a pleasant
  • the brake can also be actuated by electronic signals without the driver having to actively intervene, for example, by an electronic stability program ESC or an ACC regulating distance control system be issued.
  • the present invention has for its object to provide the fallback mode of a "by-wire" vehicle brake system with an independent of the functioning of the pressure-providing device braking force assistance.
  • a brake system according to claim 1, according to which it comprises an electrically steu ⁇ erable additional pressure supply device by means of which the master cylinder is actuated, in particular by means of which a pressure in an intermediate space of the master cylinder is controlled or regulated.
  • the invention is based on the consideration that an elec- rohydraulische brake system, which is a "brake-by-wire.” - has normal mode and a hydraulic fallback on ⁇ , in any operating condition braking force be ⁇ riding make must be sufficiently This should happen especially if the control unit for controlling the pressure supply device or the pressure supply device itself have a malfunction or fail completely.
  • this object can be achieved by providing an independent additional pressure supply device, by which the master brake ⁇ cylinder can be operated to some extent externally.
  • the additional pressure supply device is hydraulically connected to a gap in the master cylinder such that a piston in the master cylinder is actuated upon displacement of pressure medium in this space by the Sak horr- supply device and thereby pressure in the chambers of the master cylinder is built or from there brake fluid in the brake circuits is moved.
  • the brake system in a so-called "brake-by-wire” mode is controlled both by the driver and independently of the driver, preferably it is operated in the "brake-by-wire” mode and can be operated in at least one fallback mode . in which only the operation by the driver is possible.
  • the brake system for motor vehicles comprises an actuatable by a brake pedal master cylinder, a Radbrems- pressure modulation device to which wheel brakes are connected, an electrically controllable Druck washer eins ⁇ device (preferably a cylinder-piston arrangement, the piston actuated by an electromechanical actuator is), a pressure regulating valve arrangement for controlling and / or controlling a wheel brake pressure applied to a wheel brake and an electronic control unit ⁇ (electronic unit, ECU), which the control or regulation of the brake system in a normal braking function without amplification by an additional amplifier (additional pressure - Provisioning device) is used.
  • a brake pedal master cylinder a Radbrems- pressure modulation device to which wheel brakes are connected
  • an electrically controllable Druckmaschinens ⁇ device preferably a cylinder-piston arrangement, the piston actuated by an electromechanical actuator is
  • a pressure regulating valve arrangement for controlling and / or controlling a wheel brake pressure applied to a wheel brake
  • the pressure regulating valve arrangement is preferably connected hydraulically to the master brake cylinder, the pressure supply device and the wheel brakes.
  • the wheel brakes can be supplied either by the master cylinder or the pressure supply device with system brake pressure.
  • the pressure supply device actuates the wheel brakes preferably directly via the pressure control valve arrangement, that is, z. B. the pressure chamber of the pressure supply device via at least one valve with each of the wheel brakes connectable.
  • the brake system according to the invention comprises an electrically controllable additional pressure supply device (an electrohydraulic auxiliary amplifier).
  • This booster is preferably designed as an independent and optional module of the brake system, wel ⁇ ches is used in heavy vehicles, which do not achieve a sufficient braking effect without a brake booster. In lighter vehicles and in vehicles with wheel brakes particularly efficient this optional Mo ⁇ dul can be omitted, no significant structural changes to the remaining brake system (basic structure) are required. This allows a factory simplification of the production of the same basic brake system for different vehicle types. As a result, development and manufacturing costs are saved.
  • Example According to the booster amplifier and the supply pressure set comprises providing device an electric motor, a pump, a pressure sensor, a pedal travel or the pedal angle sensor, an electrical energy storage device and a second electronic control unit or electric ⁇ nikaji.
  • the booster amplifier preferably provides an electronically controlled booster boost pressure, which is passed via a hydraulic connection to a gain active area in the master cylinder and actuates the master cylinder there.
  • the second control unit or electronic unit of the additional amplifier (ECU2) is advantageously connected via a communication link to the first control unit or electronic unit for the normal function. If necessary - for example, if the first
  • the Rajettanikriks- device actuates the master cylinder for setting a target pressure, in particular a target pressure in the intermediate ⁇ space of the master cylinder, when the first control and regulating unit and / or the pressure supply device is partially or completely inactive or not funktionsfä ⁇ hig. That is, the booster is used only when the regular pressure build-up by means of the pressure supply device due to malfunction and / or control disturbances is not possible. In this way it can be ensured that even with such a component failure enough brake pressure can be built up in the wheel brakes. About a communication link described above between the first and the second control unit can be detected via appropriately selected signals ge ⁇ such a state.
  • the first electronic control unit is connected to a first sensor, which determines the brake pedal or brake pedal angle or this ent ⁇ speaking size, and theificatlichrstel- averaging device with a second, in particular independently executed, sensor, in particular a brake pedal travel ⁇ or brake pedal angle sensor connected or it includes this sensor, which determines the brake pedal travel or the brake pedal angle or a size corresponding thereto.
  • the booster amplifier thus, so to speak, preferably comprises a pedal travel or pedal angle sensor for detecting the pedal operation.
  • a force sensor which detects the brake pedal actuation force would be too expensive as a signal generator for the auxiliary amplifier, in particular with regard to a mo ⁇ dul facede embodiment of Rajettarajkssensvor- direction.
  • the availability of the brake assist is also extended to operating conditions in which the normal radio ⁇ tion of the brake system is not available.
  • a target pressure for actuating the master cylinder is determined.
  • Sig nal ⁇ of the first sensor are not notwen in this case ⁇ dig. This interpretation supports a modular Gestal ⁇ processing of the additional pressure providing device.
  • a brake ⁇ system pressure is preferably provided by the pressure supply device.
  • the pressure supply device is advantageously formed by a cylinder-piston device whose piston is actuated by an electromechanical actuator.
  • a hydraulically actuable simulation device with at least one elastic element is connected to the master brake cylinder, which, in particular in the "brake-by-wire" mode, gives the driver a pleasant pedal feel ⁇ leader on actuation of the brake pedal pressure medium in the Simulation device or the simulator, wherein pedal travel and / or pedal angle are determined and the determination of a desired braking torque are based. In this way, a reproducible relation between the pedal travel and a target value of the brake system pressure can be realized.
  • the advantages of the invention consist in particular in that is independent of the active in normal operation pressure supply device for providing the braking action ⁇ system pressure is realized by an additional pressure supply device.
  • the auxiliary pressure supply device can be used in heavy vehicles, where an additional brake pressure build-up is necessary to meet the legal requirements ⁇ . In lighter vehicles then it may possibly be waived.
  • the remaining components of the brake system can then be used for both types of vehicles without adjustments.
  • the modular design can be implemented in a consistent manner.
  • FIG. 1 The exemplary embodiment of a brake system according to the invention is described in detail below according to the FIGURE. ben.
  • contemporary elekt ⁇ rohydraulische brake system consists essentially of egg ⁇ ner actuator 1 with a Tandemhauptbrems- cylinder 4 and a simulation means 3, an electrically controllable pressure supply device 2, a Radbremstikmodulations worn or pressure control valve assembly 5, and an electronic control unit ( ECU) 10.
  • Wheel brakes 6, 7, 8, 9 are connected to the wheel brake pressure modulation device 5.
  • the pressure chambers of the master cylinder 4 are connected to a pressurized gas reservoir under atmospheric pressure ⁇ 11.
  • the assignment of the wheel brakes 6, 7, 8, 9 to the brake circuits I, II is made, for example, such that the wheel brakes 8, 9 connected to the first brake circuit I are associated with a vehicle axle, while the wheel brakes 6 connected to the second brake circuit II , 7 serve the deceleration of the other vehicle axle.
  • the indirect detection of the pressure applied in the wheel brakes 6 to 9 during a braking pressure can serve, for example, not shown wheel speed sensors.
  • the master cylinder 4 is actuated via a brake pedal 19.
  • the actuation of the brake pedal 19 is detected by means of a preferably redundantly designed displacement sensor 30, the z. B. senses the way a piston and thus the Fah ⁇ rer physicallyerkennung or a setpoint generation in the electronic control unit 10 is used.
  • the electro-hydraulic pressure supply device 2 consists, for example in accordance with essentially of a hydrauli ⁇ rule cylinder-piston assembly 43 and an electro-mechanical actuator 44, which is formed for example by an electric motor with a reduction gear, which converts a rotational movement of the electric motor into a trans ⁇ latory movement of a hydraulic piston 45, so that in a pressure chamber 46 of the hydraulic cylinder-piston assembly 43, a hydraulic pressure is built up.
  • the electromechanical actuator 44 is out of the electrical ⁇ rule board power supply (not shown) of the vehicle, gegebe ⁇ appropriate, buffered by an electrical energy storage (not shown) supplied with power.
  • the movement of the piston 45 is indirectly detected by means of at least one Drehwin ⁇ kelsensors 48 which senses the rotor position of the electromechanical actuator 44.
  • the wheel brake pressure modulation device or pressure control valve arrangement 5 is hydraulically connected to the master brake cylinder 4, the pressure supply device 2 and the wheel brakes 6, 7, 8, 9, for example. It serves to regulate and / or control a wheel brake pressure applied to a wheel brake 6, 7, 8, 9. Thus, the wheel brakes can be acted upon either by the master cylinder 4 or the pressure supply device 2 with pressure.
  • the pressure chamber 46 of the cylinder-piston assembly 43 is connected to the wheel brakes, for example, via the wheel brakes associated, normally closed ⁇ seat valves 14.
  • the electromechanical-hydraulic actuator 43, 44 builds up the brake system pressure, from which the wheel brake pressure modulator or pressure control valve arrangement 5 generates wheel-specific brake pressures.
  • a wheel brake pressure build-up in normal operation takes place via a normally closed analogue seat valve 14 and a Radbremsdruckabbau via a currentless ⁇ fenes analog seat valve 15 (the output example according to a normally closed valve 17 per brake circuit to the pressure medium reservoir 11 is connectable).
  • the seat valves 14, 15 are in this example soien ⁇ oriented that the valve stem of the pressure build-up we ⁇ kenden seat valve 14 is loaded by the actuator pressure in the direction of lifting the valve seat and the wheel brake in the direction of pressing against the valve seat, and that acting as a pressure relief valve seat valve 15 is loaded by the wheel brake pressure in the direction of lifting the valve seat.
  • the pressure chambers of the master cylinder 4 are each connected via a normally open release valve 13, which, for example in energized state, the effect of a check valve connected to the normally open pressure reduction valves or seat valves 15 of the wheel brakes 6 to 9 or connectable.
  • the two chambers of the tandem master cylinder 4 via the now open separation ⁇ valves 13) and other normally open valves 15 of the modulator are directly hydraulically connected (in other possible variants of the brake system, the other normally open valves of the modulator brake pressure build-up valves and for example, also executed digitally).
  • the other normally open valves of the modulator brake pressure build-up valves and for example, also executed digitally.
  • Switching the modulator or pressure regulating valve arrangement 5 from the fallback mode to the normal mode operation is carried out in the illustrated example by a Bestro- men of four switchable valves 13, 17.
  • the compound of acting as a brake pressure reduction valve seat valves is interrupted 15 with the master cylinder 4 and the valves 15 are on the output side connected to the pressure ⁇ medium reservoir. 11
  • the master cylinder 4 In a normal operating mode of the brake system ("brake-by-wire" mode), the master cylinder 4 is decoupled from the wheel brakes by means of the valves 13 and Druckmit ⁇ tel is moved by the driver from the two pressure chambers of the master cylinder 4 in the simulation device 3, which The brake pressure at the wheel brakes is provided by the pressure supply device 2.
  • an emergency operating mode which is also referred to as a fallback ⁇ level (all valves of the modulator, but not the valve according to the invention additional amplifiers are in a de-energized state)
  • the wheel brakes via the valves 15, 13 connected to the skin brake cylinder 4 and the brake pressure is z. B. provided by the driver.
  • the simulation device 3 represents a hydraulically actuated pedal feel simulator.
  • the simulation device 3 comprises, for example, an elastic element 33 (eg a simulator spring) and a piston 28, which constitutes a boundary of a hydraulic space 26.
  • the hydraulic ⁇ cal chamber 26 is connected via a normally open valve 50 with the pressure medium reservoir 11.
  • the piston 28 has on the simulator spring 33 opposite side two hydraulic active surfaces 51, 52, which each with the pressure of a hydraulic circuit I, II of the (tandem) master cylinder 4 can be acted upon.
  • the simulation device 3 comprises, for example, two hydraulic active surfaces 51, 52 whose movement, in particular rigidly, is coupled to one another, wherein each of the active surfaces 51, 52 is acted upon by the pressure of one of the brake circuits I, II of the master brake cylinder 4.
  • the simulation device 3 is, for example according to increasing and executed from ⁇ switchable, in particular a hydraulic chamber 26 of the simulation device 3 connectable to the at atmospheric pressure pressure fluid reservoir 11 / separably by means of an electrically controllable release valve simulator 50th
  • the brake system comprises an electrically controllable additional pressure supply device 60 (electrohydraulic additional booster), by means of which the master cylinder 4 can be actuated.
  • a gap 61 of the master cylinder 4 by the additives is pressure-providing device 60 subjected to pressure, which results in an actuation of a piston 62 of the main brake cylinder ⁇ . 4
  • the additional pressure supply device 60 (additional amplifier) thus acts as a brake booster upstream of the master brake cylinder 4, the one applied via the brake pedal 19 actuating force an additive additive additive power.
  • the auxiliary pressure delivery device 60 comprises an electric motor 63, a pump 64, a back pressure regulating valve 65, a pressure sensor 66, a pedal travel or pedal angle sensor 67, an electrical energy store 68 and an electronic unit 69 (ECU2).
  • the additional pressure supply device 60 supplies an electronically controlled additional boost pressure which is conducted via a hydraulic connection into the intermediate space 61 in the master brake cylinder 4 and thus actuates the master brake cylinder 4.
  • the additional pressure supply device 60 is thus carried out largely self-sufficient, in particular as regards the power supply and the sensors.
  • the electronic unit 69 is, for example according connected via a Kom ⁇ munikationsimpl with the control and regulating unit 10th If necessary, z.
  • the additional gain function is activated.
  • the pedal position is determined by means of sensor 67 and converted according to a predetermined characteristic in an additional gain target pressure.
  • This set pressure is set by the electronic unit 69 with the aid of electric motor 63, pump 64 and pressure sensor 66.
  • the brake system according to the invention can be used both for axle as well as for diagonal brake circuit distribution.
  • ECU2 Electronic unit

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Regulating Braking Force (AREA)

Abstract

L'invention concerne un système de freinage pour véhicules automobiles comprenant un maître-cylindre de frein (4) pouvant être actionné au moyen d'une pédale de frein (19) et auquel sont raccordés des freins de roue (6, 7, 8, 9), un dispositif d'apport de pression (2) à commande électrique, un agencement de soupapes de régulation de pression (5) pour réguler et/ou commander une pression de frein de roue injectée au niveau d'un frein de roue (6, 7, 8, 9) et une première unité électronique de commande et de régulation (10) qui commande ou régule le dispositif d'apport de pression (2) et/ou l'agencement de soupapes de régulation de pression (5). Le système de freinage selon l'invention doit être équipé d'une assistance à la force de freinage qui est indépendante du fonctionnement du dispositif d'apport de pression et comprend à cet effet un dispositif d'apport de pression supplémentaire (60) à commande électrique au moyen duquel peut être actionné le maître-cylindre de frein (4), notamment au moyen duquel peut être commandée ou régulée la pression dans un espace intermédiaire (61) du maître-cylindre de frein (4).
PCT/EP2011/064595 2010-08-30 2011-08-25 Système de freinage pour véhicules automobiles WO2012028521A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201180042046.4A CN103079914B (zh) 2010-08-30 2011-08-25 用于机动车辆的制动系统
KR1020137007847A KR101926883B1 (ko) 2010-08-30 2011-08-25 자동차용 브레이크 시스템
EP11748938.5A EP2611658B1 (fr) 2010-08-30 2011-08-25 Système de freinage pour véhicules automobiles
US13/818,143 US9096206B2 (en) 2010-08-30 2011-08-25 Brake system for motor vehicles

Applications Claiming Priority (4)

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DE102010039931.0 2010-08-30
DE102010039931 2010-08-30
DE102011081461A DE102011081461A1 (de) 2010-08-30 2011-08-24 Bremsanlage für Kraftfahrzeuge
DE102011081461.2 2011-08-24

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WO2012028521A1 true WO2012028521A1 (fr) 2012-03-08

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US (1) US9096206B2 (fr)
EP (1) EP2611658B1 (fr)
KR (1) KR101926883B1 (fr)
CN (1) CN103079914B (fr)
DE (1) DE102011081461A1 (fr)
WO (1) WO2012028521A1 (fr)

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KR20130102059A (ko) 2013-09-16
EP2611658A1 (fr) 2013-07-10
KR101926883B1 (ko) 2018-12-07
CN103079914A (zh) 2013-05-01
DE102011081461A1 (de) 2012-03-01
CN103079914B (zh) 2015-05-27
US9096206B2 (en) 2015-08-04
EP2611658B1 (fr) 2014-06-04
US20130147259A1 (en) 2013-06-13

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